Genesis 25:21-23 World English Bible (WEB)
21 Isaac entreated Yahweh for his wife, because she was barren. Yahweh was entreated by him, and Rebekah his wife conceived. 22 The children struggled together within her. She said, “If it is like this, why do I live?” She went to inquire of Yahweh. 23 Yahweh said to her,
“Two nations are in your womb.